Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

How many 4 digit numbers are their whose squares end in 2?

### Question 2

What is the least number that should be subtracted from 0.0509 to make it a perfect square?

### Question 3

What is the value of $√{(11 - 2√3) × (11 + 2√3)}$?

### Question 4

If $√2$ = 1.41, then what is the value of ${√2}/5$ − $4/{√2}$?

**A**

-2.546.

**B**

-2.665.

**C**

-2.412.

**D**

-2.049.

**Soln.**

**Ans: a**

The given expression can be simplified to ${{(√2)^2} - 5 × 4}/{5 × √2}$, which is same as ${2 - 20}/{5 × √2}$, which is same as ${-18/{5 × √2}$. Rationalizing, we get ${-18/{5 × √2} × {√2/√2}$ which gives ${-18√2}/10$ which = -2.546.

### Question 5

What is cube root of 0.000729?

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This Blog Post/Article "Square and Cube Roots Quiz Set 009" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2020-01-14.